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A measurement result should be reported as

  • A.the mean of many readings quoted without qualification
  • B.a best estimate with a stated uncertainty
  • C.the indicated reading alone
  • D.the largest and smallest readings obtained during the test

Answer: B

Correct answer: a best estimate with a stated uncertainty

A result without an uncertainty cannot be used: the reader has no way to judge whether it agrees with another figure, meets a specification, or supports a conclusion. Reporting the best estimate together with its uncertainty, and the basis on which that uncertainty was arrived at, is what makes the measurement usable by someone else.

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